You would hope. I know of one case of an indie dev of an extremely successful, multimillion dollar franchise who did in fact lose everything related to the orig

You would hope. I know of one case of an indie dev of an extremely successful, multimillion dollar franchise who did in fact lose everything related to the original game that made them successful, something which probably has cost them millions of dollars because they were unable to port it despite demand, and they've spent over a year recreating it from scratch.