If Corbyn stands, I'd prefer that he wins, in that he would be standing against a candidate representing something awful (
starmer's Labour, the shabby treatment of Corbyn, Abbot and several others, the weaponisation of anti-semitism and plenty of other things). Same time, I struggle to see much that is positive in a Corbyn victory. His period in power was one of inept strategy, no sense that he might link the Labour Party to communities in struggle or anything other than reheated social democracy. His victory would just be as a minor thorn in starmer's side and, for that matter, a failure to even think about breaking with Parliamentary politics.
Edit: I thought Tony Benn was, generally, a fucking idiot. However, I did like his line about leaving Parliament to start doing politics (even if, from what I remember, it didn't amount to much). To be honest, I'd prefer it if Corby could come out with something similar.