Upon closer inspection while re-reading the chapter
it doesn't look like Ichigo's decapitated at all, to me
it looks like Ulquiorra's tail around his neck holding
him. Also it looks like Ulquiorra forms a black ball
thingie, probably a black cero, which probably is
what created the hole in Ichigo's chest.
Still I do hope that Ichigo transforms to his other
self, goes ape-shit on just about everyone who
can't escape in time (friends and foes), gets sealed
in Hueco Mundo where he ultimately kicks Aizen's
behind when he returns.
Just about anything other than the usual bullshit
where the hero returns from the dead (more or less)
and deals with the former way superior bad guys
like nothing will do though. Maybe Orihime taking the
gloves off or something.