Hey, we won't spoil the surprise, but the highly anticipated Marvel comic book — Captain America No. 600 — goes on sale today (on an unprecedented Monday sales day) and promises to answer all the questions about the patriotic hero's possible return.

For a spoiler-ridden account of the details check out the Robot 6 blog and be sure to talk to Cap writer Ed Brubaker when he hits town for the big HeroesCon comic convention this week.