After reading over what some of you had to say age wise with Will and that it might become a reason to add a romance between him and Jill, then I wouldn't be up for that. I don't want to see any type of romance between them at all. Period. Exclamation Mark! However I wouldn't mind seeing Will in the part again if there's no romance added. If not I wouldn't want there to be any romance whatsoever.

Besides Eustace and Jill should just stay friends, plus they bicker too much.

If Asa was older I can too see him as a smashing Rilian. He's just got that special charm now to where I can only see him as a prince or king in these films.

I'm not sure who some of the suggested actors here are. Maybe I don't know that many teen British actors. But I do think they should find someone who is British, like most actors in the first three films.

If they find someone around 15-16 who hadn't gotten a growth spurt and voice change yet, just like Will Poulter in VDT, that would be perfect!

I also want someone relatively unknown to American audiences, just like James, the Pevensies, Ben, and Will. I think acting ability and fitting a part are much more important than star quality or name recognition.

Please recast. As much as I loved Poulter's acting, the age puts too much of an opening for a romance between Eustace and Jill.

I forgot about that!

It's hard to imagine a fantasy movie with two twentysomething leads of opposite genders, without any sort of romantic tension.

Very good point. And although a romance between Eustace and Jill would make more sense than one between Susan and Caspian (given what we see of their relationship)*, IT DOES NOT HAPPEN IN THE BOOK and so it shouldn't happen in the film either.

So we need a Eustace who is only a few weeks older than the Eustace who left Narnia at the end of VDT (as I guess they ought to keep some continuity and not make him a lot younger, even though he possibly was a lot younger in the books) - and a Jill of basically the same age.

Picking an actor of the right age now is made difficult just by the fact that he or she will probably be at least two or three years older by the time that filming begins. And they grow up so fast ...

*
I should perhaps rather say that it would not make as little sense as the Suspian romance. It wouldn't make sense at the ages they are in SC - but I think it might have made sense later, if they had survived the train wreck and grown to be adults together.

I say someone new Will Poulter did a graet job on VDT (he was the best part of the film in my opinion) but he's far too old now.

I say re-cast. Looking at recent video of Will, I just can't see him as Eustace anymore. I just don't think he would be very good.

Please recast. As much as I loved Poulter's acting, the age puts too much of an opening for a romance between Eustace and Jill.

Goodness gracious me. You're probably right....
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Nope, can't come up with the words to describe my feelings on that. I'll just click Submit.

New actor, please. Will Poulter's great, but he's too old. More importantly, he looks to old.

I'm not exactly opposed to Asa Butterfield. But I keep seeing him fancast as just about every young boy/teenage boy, and he's starting to get on my nerves. I'd rather have a completely fresh face to get to know.

With the amount of delaying in the filming of VDT, they were very lucky that Will Poulter stayed short enough to play a 12-13 year old, and that his voice didn't break. He was already in his mid teens, and by the time the moratorium allows new filming he will be well into his 20s. He is, as has been mentioned, a well built, tall, deepish voiced young man.
No, this would not work.
However I would like to see a boy of similar looks (light brown hair, freckles, strong facial features), aged no more than 15, whose voice has still not broken - or only just. Will was good at using his voice to show emotion, which suggested at times that it was on the verge of breaking.
I can see a makeup credit being needed for the person who reproduced "Eustace's Eyebrows" to resemble Will's distinctive ones!

There is one further reason I think it would be unwise to re-cast Will; he has just played a young man in a film with material that would not be good to associate with the Narnia franchise.

The youngest I can see Will Poulter passing as is maybe a freshman in high school, so about 13 or 14. Even that is a stretch. I thought he was perfect in VDT, but it depends on whether they're continuing or rebooting the series. If they're picking up where it left off, I would actually want Will to come back as Eustace. However, if it's a reboot, I wouldn't recommend it. Make the movie it's own, independent thing and give the characters something fresh- possibly their canon age.
I don't really have any suggestions for who should play Eustace, but I'm feeling pretty sure that it won't be Will Poulter.

If the only reason why you don't want Will Poulter do be recast is that it creates "too much of an opening for a romance between Eustace and Jill", that's pretty pathetic. Have a little more faith in Douglas Greshem! I doubt that there will be any romance, BUT just the thought of it is just as scary is if they casted Tilda Swinton as LOTGK!

I'm actually quite surprised by the poll on the front page. 80% of voters still want Will to return. I would have assumed it would have been a 60 40 thing. I think they're going to recast him but I'm not too sure.