I think I echo what everyone else is saying - I doubt that anything that is going on now is hinting towards a possible disbandment. I think it's also worth noting, that while all the anime and Collection singles were solo, they were all released together as one, and there wasn't any member that was left out or that was highlighted more. In my opinion, these were more of a "team" effort that showed them each individually, rather than them doing solo work and drifting apart.