I don't think he has a chance to win in the long term; his political history is too petty, shortsighted and shallow and he's too aligned with fairly polarizing positions to ever wash off the stink.
Maybe a minority government, if the LPC just implodes but would be as a result of the other guy failing, vice his standalone merit. A lot of his seats were votes against the Trudeau Liberals vice votes for the CPC, and he missed that small window.