It really would be a shame if they pass Ravi and Rob (for that matter) over for the top spot & bring someone in from the outside. I think they are both more than capable of handling it, and I believe it has been proven. I hope the posting is more a formality than anything else, like what was said previous.
I think they should make Ravi and Rob #1 & #2 on weeknights, in whatever newscast slots they want to give them. Make Mark (and maybe even Terrell) the primary fill-ins, and hire somebody new for the weekends who could also do it. Stop "beating around the bush," if you will.
And while they are at it, they should (permanently) move Larry Mowry to the 10pm newscast & reassign Cheryl Scott somewhere else. Lately, whether she has been off or filling in on GMA, we have seen more of Larry at 10pm than her. Heck, early last week, it was Greg and Phil doing the weeknight newscasts. Larry, in my opinion, is much more professional and a lot more knowledgeable. Again, my opinion only.