Marvel: The End...canon?
Some people are saying that all the separate 'The End' series, (ie. 'Marvel: The End, X-Men: The End, etc), are supposed to be like 'What-Ifs'...but then how do you explain the 12-issue limited Thanos series? That appeared to be fully canon.
Perhaps 'Marvel: The End' was supposed to be the only canon series of the bunch. It'd be really stupid if it wasn't.