I will say this much about your guesses... there are mods missing from those lists. Not saying which mods and which lists, but there are missing ones.

Thank you muchly for the rescue! Twas greatly appreciated! After that brief escape, they threw me in a dark room and played creepy laughs over and over again. Enough to give a girl nightmares!

No nightmares though thanks to the rescue!

Oh, what evil, evil things! *sobs and flails arms*

About the missing mods... yes, I didn't realize how many there were. xD Did Emeritus mods participate, too? (the ones that have been pretty active, that is) I just guessed the ones that came to mind, and I also kept it to superheroes that I interacted with or had a hunch about, since I would not be sure about the others and would just be throwing random guesses around to some degree.

Some did. Some didn't. But there is at least one or two active mods that are missing from the lists.

May I suggest someone make a master list and then you can all add to it and try and figure out who was who?

I actually like it when each member posts their own guesses. It is cool to see each person's individual interpretation of it--though I'm always amused how often Booky and I get to be the default choice for bad or tough characters.

How awful, starkat! *offers chocolate chip cookie therapy* That Joker better not show his face around here again or we will pummel it for him... How dare he treat the mods in such a despicable way!

After further consideration:
Lois Lane was possibly played by fantasia kitty. Gymfan would be my second guess.
I like Aslanisthebest's suggestion that Meltintalle was Edna Mode.
Captain America - flam? This one's pretty tough.
And a semi-wild guess for Joker - DiGoRyK?

My guesses:

Joker - PrinceCor
Black Widow - flam
Poison Ivy - fk (?)
Ben 10 - Princess Anna

Annnnnnnnd......I'm stumped with the rest.
All very good disguises though.

I was Clara Oswald, by the way. If it wasn't obvious. I'm not good at this.

I've decided that I am going to go ahead and spill the beans...

about me anyways...

No. I was not Catwoman.

I was Lois Lane.

The duo of supermouse and that girl.... for some reason, I'm going to guess stardf29 and Varna. Not sure why; no harm in guessing.

Did that respectable polite gentleman mouse not remind you of me? Yes, I was Supermouse!
In fact I rather think he was not unlike the Bilbo Baggins I played last year.

And I was not "that girl".
I was Catwoman.

Three of my guesses wrong! You were really good at making them as less predictable as possible.

Starkat - wow, that makes sense now! I think I guessed Valia because Lois' graphics reminded me of hers.

coracle - indeed, now that I think about it, I can make the connections of you being Supermouse... I think I guessed stardf because of the yellow font, which wasn't a very good lead, but...

Varna - This one surprised me the most! :O Wow!

I tried to make graphics differently than I have before in hopes of keeping people from guessing.

The funny thing about me being Lois...

I was a reporter for a newspaper at one point.

My guesses? No clue. I'm terrible at figuring out which mod was who! You guys make it SO hard! It's usually easier for me to figure out normal members... some of them have certain characteristics or speech patterns that make it easy to guess.. sometimes!

I admit though... I lied. I told many that I hadn't gotten another account for April Fools Day. I actually did.

I'm not sure how many people saw me, as I was mostly on earlier, but I was

It was quite easy for me to do since I happen to have known the series for so many years now. I'm hoping I did the character justice!

I'll try to post some guesses in here later. I'm sick (AGH) and going to rest a bit.

To help you with your guessing, I've complied a list of all the mod accounts and a list of all of the mods participating. They are both alphabetized so no help there.
Ben 10
Black Widow
Captain America
Catwoman
Dash
Edna Mode
Elastigirl
Green Lantern
Harley Quinn
Ironman
Jack - Jack
Lois Lane
Loki
Miss Martian
Mr-Incredible
Oracle
Poison Ivy
Samwise the Brave
Supermouse
The Joker
The Martian Manhunter
Thor Odinson
Violet
Zita the Spacegirl

Bookwyrm
Bookwyrm
coracle
Djaq
daughter of the King
flambeau
GlimGlum
gymfan15
johobbit
starkat
Lady Arwen
Lady Arwen
malkah
malkah
Meltintalle
MountainFireflower
MountainFireflower
Princess Anna
PrinceCor004
ramagut
shastastwin
stargazer
Pattertwig's Pal
Varnafinde

Ok lets see...

Ben 10 - PA
Black Widow - Lady A?
Captain America - no idea... maybe Gymmie?
Catwoman - Varnafinde
Dash - malkah?
Edna Mode - PP?
Elastigirl - Meltintalle?
Green Lantern - GlimGlum or gazer
Harley Quinn - malkah?
Ironman - Moutie?
Jack - Jack- stwin?
Lois Lane - starkat (I actually was suspecting this one )
Loki - actually didn't see Loki on So... Djaq?
Miss Martian - johobbit
Mr-Incredible - Lady A/ Booky? leaning toward the latter
Oracle - Didn't see this one either- guessing Booky just by process of (rather poor) elimination
Poison Ivy - either Lady A or Booky I lean toward the former
Samwise the Brave - maybe Jo if jo wasn't Miss martian, otherwise... Dot?
Supermouse - coracle (Had NO idea there )
The Joker - ummm.... Cor? If not Cor I'd guess Booky or Lady A again (based on avatar style, not the fact that the Joker is a villian )
The Martian Manhunter - didn't see them either... Flam?
Thor Odinson - gazer
Violet - mountie again?
Zita the Spacegirl - ram? I haven't guessed ram yet

95% of these are purely guesses