I'd be down
They couldn't have possibly fucked up his last run anymore than they did. He came back at an awful time when Bryan was hot, and certainly shouldn't have won the Rumble. To top it all off, they tried to bring him back as a babyface, with that plan in mind, which is completely dumb.
Seeing him on a full-time schedule again would be very interesting. Obviously his heart is still in the business if he's considering that, he could easily return on a part-time schedule and they wouldn't bat an eyelid.
Although, I'd be concerned how well he'd work matches to be honest. He was very rusty during 2014, getting gassed really easily during matches. Far cry from how he looked in 2010, where he was still in great shape. I think if he trains more to get back in to proper shape beforehand, he'd be a lot better.
There's still some matches I'd like to see him have, so I'm all for this if it happens and Batista is motivated. Although, keep him the fuck away from the Rumble please. Don't need that shit again, and having the exact same thing happen. Unless he's a Heel, but I still wouldn't want him winning it.