Well that's just weird, trying to search about this and nothing comes up got something with some people talking about a random wiki edit which stated that stamper was leaving an unannounced battleblock 2 but Cory shot it down saying that they don't do sequels.
Edit: ok here is something. I don't think it's a lawsuit between stamper and behemoth but someone in behemoth being accused of sexual harrassment?
https://www.pacermonitor.com/public/case/27806304/Cleveland_v_The_Behemoth_et_al
Also this doesn't really make sense to be related to stamper because he just did contract work for behemoth whenever they did voice acting.