Another quote that I think supports this theory.
I think this will be about Dalinar's heart as he holds the child in his arms.
But Wit then says that if his version of the contract is accepted they won't have to worry about the hearts of men as they'll have him. Now this depends on what transpired in the epilogue, if Todium tricked Wit then, as you said it won't end so well, but if that meeting really did go as Wit wanted it to there might still be chance everything will turn out alright.