they
can't replace normals. Especially when half of them don't actually look like fairies. Most flying types and "HM slaves" (zig, sentret, stoutland). The only normal types i could actually think of fairies are the "pink" ones, and some other non-pink exceptions. Happiny line, Toge-line, CleFAIRY line (lol, duh), maybe skitty and Audino. Other than those, it's pretty obvious that normals should stay normals. They're one of the most versatile types -- they simply can't take all that away.
edit: god, i type too slow. Tl;dr look at Sydian's post
Nonetheless, I think this just makes Psychic, Dark and Ghost types/moves quite left out -- even more than bug pokemon. Those types were the bomb in Gen 1&2 and i feel like they've just been fading away ever since.
..and that is what i'm worried about. Typings area already having difficulty going around the spotlight, and Nintendo adds yet another one. Come a time, we'd probably just have a few types of pokemon to really bother with... and the rest will only be but forgotten relics.
I'd want Nintendo to loop back Fairy types into typings that weren't much useful in the past decade. Dragons
should and
must remain as rare creatures -- keeping them to a limited amount, their stats still overpower mostly everything, anyway. In return, Fairy types should be weak enough as to
ONLY overpower dragons. Which in that case, also makes them susceptible to MUCH weaker types. That would at least create a reasonable rock-paper-scissor-ish circle.
The weaker ones
have to be strong against something at some point to maintain balance, and I think this
could also be the perfect time to show it. If not, then the other things i've mentioned should still be taken into consideration or else it would be a big crisis on Pokemon. At this point, the
Strongest are already decided, and the weak only get weaker as stronger typings come to join into the fray... they have to do something, and fast.
Fairy type could either go really good, or really bad. I'm hoping well that it's the former.