Oh, regarding Lesnar I´m quite easy to please. We know he was a real talent back in the days when he worked for WWE first time. Have him return to actual WRESTLING, and treat him like any other talent, then I´ll be happy about him.
But the problem with your idea is that he is not like any other talent.
He became an MMA guy in a relatively short period, became the UFC Champion and the biggest MMA draw with very little experience. The people he was beating were pretty seasoned fighters too.
Name one other wrestler who accomplished what Lesnar did (all before the age of 38)?
Lesnar aside from winning the UFC champion, also beat Vince/WWE in court (yea the news will say they settled which is BS, but that's what WWE normally does, if they are on the verge of losing, they settle like the bit**es that they are, in this case, Lesnar was about to prove that their non-compete was not enforceable).
Lesnar in UFC 200 drew way way more than what UFC and WWE expected.
Whether you like it or not, Lesnar is one of the very few draws that WWE has left. Saturating him like they do with Reigns, and Rollins is not the answer.
When he shows up, it should mean something.
All of what I wrote above is utterly useless if you hold some kind of a distaste or bias towards Lesnar.