User blog:Choetsuki Kaminari Taka/Grimmjow's return?

So I was re-reading volume 58 of Bleach when I noticed what appears to be Grimmjow's arm in the left of the second panel. If this is old news to everyone else, sorry, I was just wondering if Grimmjow is actually going to play a part in the ending of Bleach or if that was just a one time appearance, any thoughts?