I think movies must be able to live without staying after the credits at all and I feel this one did. They're certainly moving away from "you must see X to get Y."Initially coming out the theater I liked it, but as I was thinking about it some more I didn't love it. There was strong chemistry between the fantastic four so that was a huge plus and I really liked the Silver Surfer character. Also, the 60s aesthetic was probably the best part of the film, not to mention a great score that gave it a classic feel.
The reason I didn't love it I will put in spoiler code. I'm coming at this from a non-comic reader so what I'm about to say is probably not what the filmmakers are going for or not what is in the comics.
I wonder if Marvel is coming down with Cliffhanger syndrome. What I mean is a pet peeve that I've had in the past is you have a cliffhanger and then when the show comes back from hiatus, that cliffhanger is solved in the first minute or 2. As someone who has watched a lot of Marvel properties in the last two months, I'm starting to get a little frustrated that none of these end credit scenes will pay off. When I came out of Thunderbolts*, that end credit scene got me excited for Fantastic 4. Coming out of Fantastic Four, I wish we had a scene that was the Thunderbolts* sequence from the other side. The New Avengers sees the Fantasic 4 ship, but how about a hit of the Fantastic 4 ship seeing the New Avengers. I'm assuming they put Galactus and Silver Surfer into our universe setting up Doomsday, but I worry that all the end credit scenes I've seen won't really amount to much. I guess that was Doom at the end, but I have no idea who that is so it didn't really mean that much to me. I just wanted to be as excited as I was coming into this movie and feel a little let down that I wasn't. It didn't ruin the movie for me, but thinking about it in the car, there wasn't much to this movie that was mysterious or really progressing forward. It was meeting the fantastic family, whetting the appitite for Galactus and finding what what the Baby can do. I guess I expected a little more whetting?
I'll be fair and give this movie a B.
I came away from it as you say thinking that there's a lot of Heavy Lifting to get the FF into the 616 universe and that will all have to be plowed into the next Avengers movie which seems like a lot of burden without it being an FF movie overall.