No one can do anything to stop you from introducing your own proposal, but remember that more proposals will lessen the chances of any proposal passing.
You've had months to try to repeal On Abortion on your own. Please do not use this opportunity to piggyback and come up with your own proposal. I promised not to write another draft until June. You've been free to try to repeal On Abortion all along; if you haven't taken that chance, please do not ruin this effort by overwhelming the General Assembly will too many repeal proposals.