I would wait till Super Smash Bros roster gets revealed, then we can add SSB4DLC in the bottom right corner.
On another note I support. I don't believe Inklings will make the initial roster but I can see later in 2015, a DLC pack consisting of new Nintendo IPs with Inklings, Wonder Red (I think it's high possibility that we will see him as DLC) and Captain Flemming (might of got the name wrong but it's the guy from the upcoming game, Codename S.T.E.A.M).
If anything, this is probably the most feasible DLC pack we could possibly get, aside from a Cut Veterans Pack and maybe a 'Royal Guardians' pack with Toad, Bandana Dee, and Impa. They all have 75-100% chances of getting into Smash 5, though!
I love me some Toad, but in all honesty if the Inklings were the first and/or only DLC character, I wouldn't even be [that] mad, because they're awesome, would be wholly unique in comparison to the rest of the cast, and the great reception they've garnered for themselves since their reveal basically guarantees them a spot in the next game even if Splatoon as a game doesn't live up the hype it's generated (which, albeit, is unlikely for various reasons), so why not add them now, especially if DLC ends up on the cards after the 3DS and/or Wii U versions or SM4SH are releases.