Roger is really making money moves if he gets an equity stake in ESPN and gets ad revenue from other league's games without the overhead of running their own media content.
Being serious though, I just think this would be another domino in setting up infrastructure for the NFL to go global. ESPN broadcasts to over 200 countries and the NFL having a stake would only lead to it getting pushed more. The premier league and la liga proves you don't need a team to be within a region for it to be popular. You just need to get a foothold by broadcasting it with a few marketable stars.