should they add on previous FF series content into this?

just thought.. wow has a rich story/lore/background/characters to support it game, such as dragons.. titans.. gods.. blah blah blah, which was extremely cool and engaging. 

i know all previous ff series doesnt link at all, and probably hard to force them into a world of ff14arr, but i am sure SE can always use any of items from any of FF games? (i am only lvl39, ar dragonhead now there's probably lot of things i havent seem yet ) such as heavy steam punk  style city/objects from ff6. some futuristic theme from ff8/10/12/13, maybe some character too? like shadow/celes/tifa/cid or fking kefka? also there's always some netural cities that have their own characteristic, like opera town, auction town from ff6, golden saucer etc etc. 

i really hope they can implant some things from previous FF game into this world, that wiill definitely give me a "wow, no way! i know this one from this game!"