cyberverse soundwave's problem isn't that he's hollow
it's that he's A) one of the smallest mainline Soundwave's ever, with only Prime beating him out B) a terribly ugly alt mode
basically, it's a pretty solid gimmick, and a fun robot mode, but not much else.
RID soundwave was far superior
So like >>7436222
said, if it goes on sale sure
but also, there seems to be no hard rules about who in cyberverse gets bigger toys.
Shockwave, Grimlock, Starscream, Megatron, Optimus, Bumblebee, Slipstream, and Shadowstriker have all gotten ultra class toys. Alpha Trion's getting one and we don't even know how big a role he plays.
and the new spark armor toys come in 2 different sizes too