Considering there's currently 31 and development started March 2013 (Could've sworn it was 2011/12) I just don't see it as likely.
31/89 (current girls/months in dev)
.35 (girls per month)
.35*12
4.2 (girls per year)
151-31
120 (remaining)
120/4.2
28.57 (years to 151 at current rate based off of seven years)
Don't get me wrong, I can understand wanting to work on something else after 7 years and I do like the premise of the new title. I just don't think I'll ever get to show a completed haremdex to Prof. Bluepill.
That's not really how development works. First of all you can't compare present day development time to early day. Early game dev was much, much slower back then. Progression has really sped up this last year it's going at a rapid pace.
Also that math assumes everything is gonna be equal which it isn't, for one they aren't even gonna use the same engine(RPGM is
very limiting and they have to keep expanding on it with new scripts with basically every release), and much of the databases like items, status effects and so on can be reused if needed they don't have to start completely from scratch with every new iteration, there will be preestablished concepts, ideas, mechanics and so on that can be reused