What do you think Reiner, Bertholdt, and Annie’s plan was if they successfully got Eren to Eldia?

So of course as soon as those 3 found out Eren had the attack titan they tried to capture him, do you think if they brought him back that the Eldians would’ve forcefully taken the attack titan back? Or do you think Zeke would’ve stepped in and it would’ve gone a different way? Honestly don’t see a way Eren survives if he goes to Eldia regardless, they’re not going to just keep him prisoner and waste a perfectly good titan, maybe the goal was to convince him to join their side?