Wait a moment please
You realize that Lucina has gameplay differences from Marth, right? As slight as they are, that alone should warrant making her a fully fledged character. In addition, the fact that she's playable allows to have her own set of Taunts, Arcade mode and trophy. Furthermore, Chrom wouldn't work as an alt to Marth due to his completely different fighting style (slower, powerful strikes + aether)
I don't feel like she's different enough to warrant that no. Nothing says that he couldn't have given her those taunts as an alt costume, has Sakurai described what the Arcade mode even is in the Wii U game? And there are a bunch of trophies for non-playable characters so I don't see this point at all. Ehhh Sakurai has been shown to twist characters to justify things in the past, good example being Robin being able to use dark magic and Ike in Brawl being nothing like how he was in Path of Radiance.
Sakurai already explained why. Unlike the male and female versions of Robin, Wii Fit Trainer and Villager, Lucina is actually her own character with her own name and her own personality, so Sakurai thought she'd be better served in her own slot.
This is just making it feel that he liked the character so he made a loophole to include her in it.
i think having characters on horse back seems kinda weird to be honest :/ but i like the sound of the dread fighter being a character
Worked for Jojo and that had two characters on horseback! Plus Wario had his bike, I can kind of sort of see horseback, it just seems like it'd be fun too.
Sigurd is one of my pipe dream characters - just based on his design, honestly. It'd be cool if he showed up as an Assist Trophy or something at least.
And people think
Marth is bishie...
Sigurd is probably my favorite lord, and I remember a long time ago in like Melee he was almost put in or something if I'm not mistaken due to his popularity. Sigurd is nowhere near as bishie as Marth, you have to consider that the last new official work for Sigurd is from the 90s that had a totally different style compared to Marth who had new artwork done for him for the remakes and Awakening. I was hoping Sigurd would get redesigned for Awakening but we got Seliph who looks pretty cool in the new art.
Think of the hilarious recovery options. Some straight up Super Mario World Yoshi suicide leaps off the mount to keep the character alive as they fight without it, gimped a bit ala Ice Climbers.
This sounds great actually.
Honestly, one of the things Sakurai never seems to acknowledge with FE reps, until robin was the fact that basically every lord can usually wield more than one weapon, and the fact of class change. I remember somebody talking about differentiating Chrom by making his FS class change and I thought that'd be a fun idea. Ike can wield axes IIRC in Radiant Dawn and Lucina gets lances when she class changes, I'm not sure about Marth. I would have liked to see those features in their movesets somehow.