MimbleWimble on Bitcoin
There is zero chance of it being used in Bitcoin.
There is prior incidents to gain wisdom from. Before zcash existed as an altcoin, zcoin was an implementation of a similar concept which people rallied behind and tried to ham fist into Bitcoin. It's essential, it's a mandatory, it's my right to be private! If you don't put zcoin into Bitcoin you are the manifestation of the devil himself, brought to destroy the fabric of society!
Unfortunately whenever things like this have been social pressured into existence for reasons of perceived valor, it has lead to problems. In the case of zcoin, it was later discovered that the implementation of zcoin slated for use in Bitcoin had an unbounded, invisible inflation bug which would have instantly ended the currency.
Bitcoin survives by being conservative with changes, not grabbing onto everything shiny.