What kind of future will Matic have with ETH2? Not much need for it after. Matic is good only for short term IMO. For longer term I would go with complete blockchain like Harmony ONE or even Ada.
I do not think so. By creating additional layers and side chains, Polygon is designed to complement Ethereum's design. It will complement Ethereum 2.0, too.
Polygon seems poised to become Ethereum's swiss army knife after all the developments and partnerships that have taken place since the rebrand.