[dvboy]

It'll be interesting to see how these re-branded sports channels play out. I wonder if they will invest new money to buy the bigger sporting rights such as the Premier League or Premiership Rugby etc in the future?

My expectation is they throw money about, but won't be able to truly compete with the money of Sky and BT when it comes to the real major properties (PL + CL football, Formula 1 etc). I predict they'll try to win ATP Tour rights since those are now available as Amazon seem unlikely to renew, and follow that up by bidding for a similar package to Prime on the next Premier League bidding window.

ATP tennis is an interesting one as you potentially have Sky interested as they are rumoured to be close to a deal for the US Open in 2023 onwards.
You then have Discovery/BT either as a joint bid under the new structure or seperately - Discovery already have ATP rights in many countries so it wouldn't cost them too much operationally to extend that, and BT have picked up the Billie Jean King Cup this November suggesting they may have a serious interest in tennis again. They did pick up some ATP 250s last year that weren't on Amazon, and have shown the UK Pro League although I'm not sure that will have attracted many viewers.
FreeSports have also shown a few ATP 250 tournaments so they'll have some experience there.