I think you are right abou Graviton and Blizard because they have noy appeared using their powers yet (not counting that freezing the window thing), but Absorbing man is going to appear using his powers, as seen here. And obviously he is going to be one of the prisioners that escaped the Fridge (SHIELD nicknaming him "Absorbing Man" as they did with Blackout)
I think we should wait until we hear Creel's alias in the series. Frank Grillo was also announced as Crossbones but he was never called Crossbones in CA:TWS. The Leader page should be moved to Samuel Sterns.