Two of anime's most popular old-timers go at it. Both characters will have composite anime and manga feats. For Roshi this includes only feats from Dragon Ball and this does include "filler" however it does not include the infamous moon feat. Whoever I went up against with Roshi I wanted that feat excluded because it's a horrendous outlier. The fight will take place on Cell's Cell Games arena and to win one fighter will have to kill, KO, or force the other to submit. They will be willing to use whatever means necessary to win.
I'm excited for this debate and I'll let my opponent go first.