My reaction of not including Alm in FE Warriors is kinda... mixed but no salt. It would be amazing if they would include Alm in the game but there is still complaints if they do that because...



Alm... is a Sword User.



When Fire Emblem Warriors was introduced, most fans were amazed yet they have one of the most common complaints about this game: too many sword users. So they need to balance the roster.



When Fire Emblem Warriors gets a sequel (hopefully), I'm very sure they will include both Alm and Celica. The first FE Warriors game focuses on Shadow Dragon, Awakening, and Fates. Hopefully still, in the sequel, they would focus on Echoes/Gaiden and they can include Blazing Sword and The Binding Blade. They can include Azura (and a few Fates characters) in the sequel if they want to.



Then if there's a third game, both Nintendo and Koei Tecmo can go all out with this one: the third should focus on The Sacred Stones and Path of Radiance/Radiant Dawn (the characters from the past games can go back as cameo/NPCs/DLCs). This should be the final chapter of the supposed trilogy, where all the heroes were gathered by an OC and the most popular lord, Ike for one last battle against evil.