Hey there, thank you for the suggestions :D, those are interesting ideas, but all other game overs we do will probably be tied to story related boss battles, like the Wharf Roach G will be.
From our side, once we reach version 1.60 it is unlikely that we will release any more content other than the modding system. Our hope is that all ideas that we couldn’t provide for lack of funds, time, overall complexity or not thinking it would fit thematically in the game, can now be provided by people that would like to seem them there :).