I'm against it for the sole reason that Nintendo have not confirmed there will be one and because I am a realist.
That's not realist with the way you thinking. They're not going to confirm it for many reasons.
A. They/gamefreak are very secretive, they honestly don't like revealing things for the public.
B. Why would they release something a work in progress. A surprise is what gamefreak is looking for, so they'll deny everything. What they're doing is like holding the meat over the dog, they're going to get everyone wanting it, and all hyped up for it, bam lay it on them, and get exactly what they want. A happy fanbase, and more importantly.
MONEY
Oni it's not realistic at all in the busiess perspective, If they release it's coming out in 4 years, the fan base would be like "uh" four years, nd may just leave mostly, a surprise would rock our socks.
They've left countless clues too. Gamefreak, Nintendo, and Pokemon all care about 1 true thing, well two actually, Money, and expansion. They know they are the empire up there with mario.
Just the money aspect of it is just enough to pour millions into their pockets, as we all want it.
Another thing is the time line and how what they said about Fire Red and Leaf green, they dont call them remakes, they say they're new versions, so duh they'd deny any term of remake.
I have more opinion but I'll hold off for now.