Unfortunately given Canada's defence procurement history, being the 'best' product means SFA, IMO. Consider the history of the Merlin and S-92 helicopter procurement programs. Helicopters were needed to replace aging SAR and naval helicopters, a selection programme was run, contracts with cancellation penalties signed, etc. One change in gov't later, the contracted order is cancelled, with a total payment of some CDN$500 mil. IIRC in cancellation and sunk costs lost. A few years afterwards, the need for replacements became more urgent and a new, albeit more limited SAR replacement helicopter programme was run, this time with the Sikhorsky entry being selected (largely because it was different from the Merlin entry the gov't of the day had cancelled a few years before) which still has not reached full service in Canada. This being over two decades after the first contract was signed...Not having any real insight into Canadian politics except that the newest PM is anti F-35 is the new selection process to rule it out entirely or merely bring in some alternatives? Is he also anything like our former PM Tony Abbott in making captain's calls?
If he is willing to sit aside and let the best product put forth (capability and cost) be chosen then the F-35 may still happen, Though if the F-35 doesn't happen I'd imagine the SH is the most likely successor having similarities with the Classics, already in us with the US etc and leaves open option to acquire the Growler.