If I'm right, the best case scenario for MNTA is no news, which should result in a steady (albeit unspectacular) increase in stock price over time.
PS You have a jaded view of "spectacular" -g-. Comes from too many binaries in biotechland? In your hypothesized scenario (no tL ever) at some point the value of MNTA has to increase with the increasing cash horde and that is increasing at a >30% per year rate. 30% per annum is a return that would be considered reasonably 'spectacular' over several years.