The dreggs of your bottles, if unpasteurized, are going to likely have brewers yeast, wild yeast, and bacteria. If you toss that on fresh cherries, the brewers yeast will likely multiply while the others won't. My suggestion would be to boil some maltodextrin and/or lactose, pour that in the carboy, and rack the beer on top of that. Then toss the dreggs in on top of everything and wait 6 to 18 months. No need for a starter. If you want to do the cherries, you could add them with the maltodextrin or even after a few months.