If he has AA he'll possibly let you show down cheap. I'd just pussy out and call both streets. I think there's enough doubt that it's reasonable showing down. 20 minutes is no time at all really to put him on nothing but AA; I'd think AJ/KJ is possible here enough to be able to call a small turn bet and then a bet on the river that may well not even have you going broke.

I wouldn't crash the flop either, I think you want to give him some rope to hang himself here if he has a bare jack. The lead out is unusual but I think I like it.

Yes, the 20 minutes isn't such a big deal as the EP raise. But at the 200s surely he's smart enough to be raising something like AKQJ etc.

I was also thinking the same thing on the lead-out. I usually go half pot on any J as well as KK, but full pot is more repping just any J, and I definitely don't mind it. Once he raises I definitely prefer calling to hammering.

I'm having trouble with the laydown, though. I guess if your gut is just decidedly telling you AA, then ok, but AJ also has to be in there (definitely unfortunate if he has AAJ). I can lay down the river to yet another A (or J), but I really hate to let it go at this point--or on rivers without A or J.