I thought so too...but firstly, maybe it's important that Batman is considered dead. I mean, they built a memorial statue already.

Secondly...even though he gave the mansion to the orphans (the Bat X-Academy?

t

, and the cave and everything to Blake....what's left and what kind of resources will Blake have to keep updating and re-equipping like Wayne did when he was swimming in dough? He left his job as a cop, so there goes that job....unless I missed a major pile of secret money that was left him. So with tat in mind, it also makes more sense that he'd establish his own separate crimefighter identity from Batman, even though he's clearly the successor.