Here is a list of crowds all the way till Extreme Rules.
W
restlemania (Santa Clara) - Obvious massive crowd, but generally very diverse and includes a lot of hardcore fans.
Raw (San Jose) - Night after WM. This is the smarkiest off all crowds since it is the lay over from Mania.
Raw (Austin, TX) - Could go either way, with this crowd may follow suit to the what they saw at Mania and after.
Raw (London, Eng) - Oh my this could be interesting. All the fans from other countries that couldn't go to Mania will have a shot a few weeks later. Expect Cena to also take a beating.
Raw (Albany, NY) - This isn't NYC so maybe it won't be as bad, but New York crowds can sometimes be pretty brutal.
Extreme Rules (Chicago) - This is arguably the worst place to have Reigns first title defence (if he wins at mania). This place is smark heaven and will likely start Reigns off on a brutal foot.
I will say that if Reigns can make it out of those lists of show with a positive reaction then I will give him major credit.