Uncanny Avengers #11

In Dark Avengers #12 Sentry discovered that he could rebuild himself even after being molecularly demolished by Molecule Man. I believe he also once attempted suicide by diving in the Sun, so it's no wonder he's returned from his 'death' in Siege. Sentry has often hidden away and refused to help in a fight. During World War Hulk he claimed to have agoraphobia. But he's also paranoid about his dark side the Void taking over. There have been many explanations of the relationship between Sentry and Void. The simplest is that Robert Reynolds has a split personality. But during Siege it was claimed that the Void was the Angel of Death. This seems to tie in more with him leaving and going to the White Hot Room. The White Hot Room is intimately connected to the Phoenix Force, but also to Death. The cameos of other teams doesn't help establish where this arc fits vis-a-vis other things such as Infinity. The presence of the original X-Men, and a friendly Bishop in the Uncanny X-Force just places it in current continuity. Spider-man being with the Avengers might indicate this is before Infinity, if as it seems he will switch to the Mighty Avengers during that event. maybe the guest appearance by the Uncanny Avengers in the Infinity tie-in Avengers Assemble #20 will clarify things. Or maybe not.

The Tabula Rasa stuff comes from Rick Remender's run on Uncanny X-Force (2010). Archangel used Genocide to destroy Tucker Creek in #14. In #15 he and Dark Beast used a Celestial Life Seed and the miniaturised Weapon Plus facility previously called the World to create Tabula Rasa, wherein evolution is massively accelerated. The area was enclosed in a dome in Uncanny X-Men (2011) #8. When Red Onslaught is mentioned we see a visual of Red Skull's head atop the armour of Onslaught. The original Onslaught was a fusing of the minds of Prof X and Magneto. Red Onslaught presumably arises from Red Skull incorporating Prof X's brain in #2. Of course the Mutant rapture plan is flawed. On Earth humans will still give birth to new mutants. And I don't believe mutants are guaranteed not to produce normal humans. Wonder Man opposed the Avengers during the Heroic Age series, culminating in the Avengers and New Avengers Annuals of that run. He claimed that the Avengers caused more problems than they solved. Since then he has realised the error of his ways, and won his way back into their ranks, but only in a non-fighting role. The ionic energy that forms his body is presumably the power source the Twins speak of. The Sunfire and Rogue entanglement happened in Rogue (2004) #10-11, and he was turned into Horseman Famine in X-Men (1991) #183.