I don't think Han Solo is dead! If he is, it's ruined the entire new series... I don't care if Han wanted out... I would have had him sacrifice himself to save Rey from Kylo Ren's fight at the end - instead of Fin injuring him.
So if Han is alive... he can get back together with Leah and protect Leah from having her be the next person Kylo tries to kill! - while Luke trains Rey so they can both confronts Kylo Ren and the supreme leader - and wiping them BOTH OUT! I don't want Kylo Ren to E V E R be forgiven for killing HAN!