Even though there are a lot of Reylo haters right now...
I feel like if and when Reylo becomes canon, there will be more (or possibly less) shippers out there, depending on how they execute the relationship.
Right now, Reylo shouldn’t happen (yet). If at the very start of TLJ they’re already in a relationship, that would obviously just be bad writing. The only interactions they’ve had were as rivals. Granted, there was a little bit of underlying softness and attraction between them in those interactions, but that’s clearly not enough to start a relationship.
But if Rian Johnson was to build their relationship and make people realise “hey, these people might actually be good for each other”, I’m sure the Reylo community would grow.
An example of this is Captain Swan (Emma swan x Captain Hook) from once upon a time. When they first met, Hook was a villain and Emma was the ‘saviour’, so obviously they were enemies. Although there was definitely some sexual tension between them and occasional softness, there were very few people who shipped them, especially since it looked like Emma was going to end up with Balefire (or whatever that guy’s name was). But when he became an ally and eventually a friend of Emma’s, their relationship developed and there was a bit of a love triangle between Emma, Hook and Balefire. When finally Balefire died, Emma and Hook went through a period of time where basically Hook was madly in love with her and she was just trying to act like she hated his guts even though she obviously had feelings for him too. But when Hook made a major sacrifice for her (I.e. He sold his ship so he could save her), she finally gave in to her feelings and a relationship started. By then, Captain Swan was now one of the main ships of the series and had many, many fans. A major contrast between when they first met to what they are now. This is basically how I want Reylo to go.
So what I’m saying is, although Reylo might seem unlikely and unpopular right now, as time progresses and their relationship develops, I believe more people will turn to the Reylo side, just as they did with Captain Swan.