Chances: 5%
A third party spinoff character seems unlikely for LoZ. I feel LoZ is quite probable to get a new character, but it won't be Lana. I'd even expect Cia before Lana (Cia too risque? I present to you...Bayonetta), to be honest, and Linkle seems more probable as well. I give it a token 5% because they could want to rep Hyrule Warriors in some way given rereleases and it IIRC being fairly popular, and if they do, Lana is a remote possibility if nothing else.
Want: 12%
She could have some decent stuff, but what really pushes this down is the sheer amount of The Legend of Zelda characters I would prefer. Skull Kid, Vaati, Toon Ganondorf, Tetra, Linkle if we wanna go Hyrule Warriors, Ghirahim, Zant, there's so many options from this franchise that I want that it pushes down people I am more tepid on. If LoZ had a large amount of characters, this might rank higher.
Predictoon: Blue Bowser
1.11%
Nomination
KOS-MOS x5