Yes.
No.
Not sure.
They'll do it later, but not yet.
Either he is preparing to fix againt the Legion continuity or he is just teasing the fans with some slight hope.
Either way, if he is preparing a "Legion of four worlds", this confirms than Bendis will never restore Clark's Legion past.
"Never assign to malice what is adequately explained by stupidity or ignorance."
"Great stories will always return to their original forms"
"Nobody is more dangerous than he who imagines himself pure in heart; for his purity, by definition, is unassailable." James Baldwin