ESPN owns all rights to Bundesliga this year.
I'm pretty sure ESPN+ will be showing all the games when they're not moved to ESPN or ESPN2, but I can't say that with great certainty because this is the first year they've had the rights. It's clear to me that ESPN won't be showing nearly as many games on a real channel as Fox did on FS1 or 2.
I'll add that you could also watch them in the Champions League when that starts by signing up for CBS All Access. But either way, soccer is sadly becoming a subscription sport in the US.