Do you think AmourShipping will lose many supporters in Gen VII? Will it gain any?
Depends on what happens in the end. If Serena ends up staying like I think she will, then amour will gain even more supporters as it will convince everyone that they are serious about this (even though they've already shown that they are serious about it).
If we don't get it like that, then yes amour will lose some fans. Personally, it will probably just be a few of the shipping bandwagoners (though it doesn't make much sense since amour is the only real ship) who just jump from ship to ship. However, this is only a small population of one of Pokemon's largest fanbase and the largest shipping fanbase by miles. So most people will stay because we choose to support something that is clearly backed by the writing, rather than follow something based on imagination. Not trying to stir anything up, but that's just how I see it logically. Amour will stay popular forever, regardless of what happens.