Well it seems that the plan is for them to win the tag titles off of Team Hell No at Extreme Rules, since according to reports, Taker isn't going to be involved in that match. As Rob points out though, not sure how great a move this would be since as far as challengers go, who's going to compete with them for the titles? There aren't any credible teams that would pose any threat to a trio who's beaten practically all the top faces WWE has to offer.
Beyond that, who knows. It depends how WWE feel about them going forward. They're not going to last forever, that's a given. But I can see them continuing for a good few months yet. I still look forward to seeing them each week.
while everyone here seems to think that Rollins will be the one that turns face out of the group, I think it might be Reigns. He's the one that Vince is more likely to be backing to be a top guy, so I can see him being the man to turn face, and I see that leading to Ambrose and Rollins tagging together for a while before both fade into obscurity.