Speaking at the Tokyo Sandbox game developer event/mixer today, Inti Creates gave some insight
into the development of 3DS and Switch release Blaster Master Zero. The reimagining of NES darling sidescrolling platforming/shooter hybrid Blaster Master
took 35 people six months to make before arriving just in time for the Switch's launch day in Japan.
We also heard about the game's sales performance on the eShop; the Switch port of the game has currently racked up 80,000 copies sold. We weren't told whether this met Inti Creates' own expectations, but this is a fairly respectable figure for what was presumably a version of the game bolted on fairly late in development.
There are tell-tale signs that this was indeed the case: The Switch version of the game inherits the 3DS's strange 5:3 aspect ratio, and the game uses non-integer scaling to scale up to both 720p and 1080p resolutions, so it's fairly clear that the game wasn't originally planned to be on Switch.
In any case, 80,000 sales for the Switch version alone should have net Inti Creates a tidy amount of revenue and would have almost certainly justified the cost of the port. Whether the game sold enough for them to have broken even is hard to say, since we lack information about sales of the 3DS version, and we don't know whether the 35 staffers working on the project were solely dedicated to it or were working on other games. The former is more likely there.
Regardless of current sales, Inti
clearly plans to make sure Blaster Master Zero has long legs. Last week it released an update to the game which added a new, remixed difficulty setting, and it's currently working on new DLC characters who are more than just a palette swap.