This is more theory than a speculation, but with the departure of comet observatory and the entrance of the starship mario, Rosalina also no longer appears (good far as I know and what was sampled last direct). This may mean that she possar be playable.

I tought on the exact same thing. I don't mind the stage change as long as there's a good reason to do that.

But hey ! It's just a theory , a game theory

Each Smash Bros sequel has added a Humanoid Pokemon Newcomer(Mewtwo=Melee/Lucario=Brawl/Greninja=Wii U/3DS), so instead of speculating a veteran I speculate on of this guys/girls as newcomers:
Bisharp
Meinshao
Magmar
Blaziken
Sceptile/Grovyle
Toxicroak

I Speculate
-Rosalina And Luma (Or Without Luma If They Want It Easy Cause She Was Removed In Galaxy Tours)
-Luffy (Because Hes Very Requested (Probably The Most Requested Character) And The Fact I Think Hes Gonna Be At Apex 2015)
-Knuckles (I Just Personally Want Him In , And He Has Good Chances Since He Was In The 1st Smash Flash , Also Might Be At Apex)
-Geno (Not The Dev. The Puppet , He Needs To Be In This Game. Lots Of Creativity Here!)
Thats All....

I think Gardevoir could fit here too. Considering she's gonna appear in Pokkén Tournament and is a pretty popular Pokémon among fans I guess it makes sense.

I thought about her but assumed that she'd be a poke ball assist. Hitmonlee isn't on the list for the same reason.

Add characters from Full-Metal-Alchemist. Especially Alphonse and Edward.
And also add characters from Final Fantasy VI "Terra"

Please add those characters for your future roster.

I really hope Zoroark gets added, too much potential with the illusion ability to be left out on the roster.

I still think Sceptile and Gardevoir would work better. Mostly because Gen V was utterly hated (tough, I personally loved it) and ORAS got released a few months ago (Sceptile) and Pokken Tournament is coming out soon (Gardevoir).
Tough, I agree with you, Zoroark has moveset potential and would be a fun charaacter to play with.

I never played GenV, but I'm fan of Bisharp and Golurk. I'm not sure about Golurk but Bisharp might not be bad as a newcomer and could have a pretty unique moveset.

Luffy before Falco would be tantamount to a kick in the nuts. I honestly don't even know what a Luffy is.

I main falco so i REALLY want to see him, maybe with a more original moveset so that he's less of a simi-clone. I also want Luffy though, One Peice was my firstan favorite anime.

Since everyone wants Luffy, he's sure to join at some point. Falco is pretty essential, though. The game currently only has 2 fast fallers. Plus, he's Falco.

Speaking of most requested characters, who do you guys think are the 5 most requested characters.

I think:
1. Luffy
1. Luigi
3. Sasuke
4. Pit
5. Ganondorf

I belive at one point Blaziken was also a well reuested character, as well as Geno but i havent seen alot of requests for them recently.