Believe it or not, I could even see a Metroid Musou happening (Metroid Force or something like that lol) after running around here. If only to hear what remixes would come of it.
I'd like some recommendations like Unison.
Samurai Warriors 4 is out next month on PS4 (which is physical and has a CE) PS3 and Vita (those 2 are download only) This is the most polished on the recent WArriors games (I have the game on vita from Japan)
The biggest difference in SW4 compared to the other is a it has CAW (create a warrior, as in create your own unique playable character) and it allows you to control 2 people in the same battle so imagine controlling Link and Zelda in the same fight. You control one and can order the other around and switch between the 2 characters during the level as much as you like. And as the title implies it's based on Japanese history, specifically Sengoku Jidai. There is also a visual novel element to this game which started in SWC (mentioned at the bottom of this post)
There is Dynasty Warriors 8 CE based on Chinese history, specifically the Three Kingdoms period. This like Hyrule only allows you to control 1 character and also doesnt have CAW mode (CAW mode is usually a Empires game adddition so SW4 having it was a nice surprise) This game allows you to merge skills from weapons just like Hyrule, unlike Hyrule and SW this game allows playable character to use the weapon from any other playable character. This is physical on PS4 and Vita, and a on PS3 though PS3 is just the XL expansion and not the main game. There's also ambition mode which is like a build your own town mode (its a rather lite version of that though)
Then there's Warriors Orochi 3 Ultimate, this is a mash up based on Dynasty and Samurai Warriors with a few characters from other games like Dead or Alive and Soul Caliber. The story is about a demon who manipulates time (thats how all the characters from DW and SW can fight together) and is just feature packed with content (thats not to say DW and SW arent but Warriors Orochi is on another level here (that's because its kinda a game and a half and this is it's third re release each time added more content. especially this release it added an entire story set after the main games story))
This is out physically on PS4 and Xbox One and digitally on PS3 and Vita.
There are cross overs too
Gundam (there are 4 games, 3 is rated the best, reborn is the most recent) PS3 and 360 for all but Reborn, Reborn is PS3 only.
One Piece (there are 2 games, 1 is based on the manga, 2 is a new story (not canon) PS3 only
Fist of the North Star (there's 2, just get 2, 2 was a rather lazy effort as it's pretty much just a re release of 1 with added content, so if you played 1, 2 would disappoint.) PS3 and 360, 2 is also on Wii U DL only.
Warriors Legend of Troy out on PS3 and 360 is based on the Legend of Troy, not many characters, uses an item system where you have to place items into a squared grid to boost stats.
There are a few handheld exclusive games
Dynasty Warriors next for Vita its not bad but over uses the vita functions for minigames and gets annoying after a while it also doesnt cover the story of China as in depth as the console titles. It's based on Dynasty Warriors 7 too, so imo if you want a vita game get DW8CE instead.
Samurai Warriors Chronicles for 3DS, this game is amazing, its Samurai Warriors switching between 4 (yes 4) characters in a battle and at the end of battles acts like a mini visual novel allowing you to get a bit extra character development outside of battle. It was the first game to have a VN aspect to it and my favourite handheld warriors game.