So Let's say speedforce or idk anything give a chance for Iris meeting Nora then night before her wedding, how do you think they are gonna get a long? What kind of conversation they have?
Oh, they’d get along splendidly.
We had a lovely opportunity to see Iris and Nora interact in Flashpoint. Clearly, Nora is happy for Barry and Iris, and that love is transferable: the Speed Force would mimic it. Speed-Nora interacts with Barry and Iris’ kids, Don and Dawn, in my fic Inerro.
Barry always worries about his friends and family interacting with Speed Force because he knows its equal parts benevolent and malevolent, but for the most part, it’s kinder to them than it is to him. Examples of its dark side can be found in my fics Be-All and Three Ghosts, among others. (Search “Speed Force” on my works’ page for a complete list.)
I headcanon that it can’t communicate clearly with them, whereas it can achieve a range of emotions with Barry. With Barry, it can convey among countless combinations a subtle disappointment, anger, and still profound love that translates to a strong warning for Barry. It would indubitably terrify anyone else. With other speedsters, it’s similarly less reserved, but Barry definitely gets the sternest talking-tos.
Plus, Flash is in love with Iris, too, and Flash is the Speed Force side of Barry. Speed Force would be nothing short of delighted to have her home. The roles would be switched: it would be Barry anchoring Iris in their reality instead of the Speed Force’s. But yes, Nora and she could absolutely converse in the Speed Force. Throw in Henry, too, if you like.
What kind of conversation would they have? Sympathetic awe. Their lives are extraordinary. (Speed-Nora is an amalgamation of every Nora, and some Noras live long enough to see their Barrys become The Flash.) General appreciation, and mutual respect. And, of course, a blessing that’s easy to obtain. Nora would have loved to have seen Barry and Iris wed.