I really don't want to have to stop playing every 3 minutes to read something.
they'll probably be some cut scene right before and possibly after the message. Just like it were a boss battle, when something new happens (i.e. Samus goes Zero Suit), it will be shown cutscene style and then the message will appear...
or maybe you have to activate the call when an icon appears...
Not really sure. Guess we'll have to wait.
http://nsiderforums.net/index.php?topic=2463.0
since they appear in read i suppose they will appear automaticaly like they do on MGS when they are red codec messages.
i dunno for sure though, maybe you can choose to see them or not.
I think it will be like when you call the arwings in melee
When you taunt, your message appears. Just go on wailing on people.