You think a 45 year old Batista is going to be a better wrestler than he was before? And keep in mind he wasn't a good wrestler back then either.
The Rock came back to fill in the need for star power and to put asses in seats.
Batista was never anywhere near the level of the rock from a talent or draw perspective, and we already have Mark Henry and Brock Lesnar for the "monster heel" role. There's really no reason for him to come back lol.
He couldn't even stay healthy back then. How is he going to do it now?
Is it going to be
#StruggleDave when he comes back and puts on 2 star classics while cutting boring "I'm a big tough guy rawrrr!" promos as a face/heel? It's going to be

when ya'll turn on him.
I'll be the first to admit The Rock's return wasn't anything great, but even out of his prime he still gave us some good promos, a decent feud with Punk and some decnet moments with Cena too. All while balancing a demanding movie schedule.
I'd love to see what Batista does when he returns.