I don't think that would happen now that MS has become CEO of IBC. The best Tesla could do IMO at this juncture is to secure an offtake UNLESS MS no longer remains with NioCorp and just becomes IBC's CEO which seems very unlikely.
Here’s my best case scenario: Just as financing was about to finalize, a buyer (Rio Tinto let’s say) wanted in and new arrangements had to be worked through. Everybody gets $20 per share and some stock.