Re: Reactions Ray: As soin as communications cut out/things seem amiss he's going to try going after Tony. Someone stops him obviously. Afterward he'll be working flat out with team science to try and get the portal stable enough to bring Tony home.
Kal: He'll offer support, assistance, guidance etc to the Avengers, whatever they need. He's been through many a crisis, even a multiversal one, so is clearheaded in moments where many panic.
Dick, Courtney and Dylan will be more concerned about their friends affected by this and trust the science crew to get Tony back.