I got sold off my MP Soundwave & Seekers several months back as well because I feel certain enough we'll get new versions eventually. I did the same with MP-14, 17, 18, 19, 20 & 21 also once it became clear we'd be getting + versions of them. I've kept the van bros as I did my own minor + mods to them, Tracks... I don't know why I haven't sold him as a + version will probably happen too. It left my MP collection depleted for a while but it's gradually filling out again. So far Soundwave and the Seekers are the only ones I've sold where a new version or + release hasn't been announced. I just feel given the direction of the line and things like the lack of a Soundwave+, new Starscream headsculpt with MP-44, that it's a matter of when, not if, they eventually get made.