Article from
4gamer
Producer Ryota on MVC3's spectator mode:
Ryota: "We threw in all the elements including ranking match, free match, rankings and the lobby, but we couldn't add in a spectator mode.
4Gamer: "Was it because of technical issues?"
Ryota: "That's correct. This title is a 3-on-3 and the game speed is very fast, so the volume of communication data is larger than in SSF4. Even if we added in all those kinds of systems, they'd be no good if the matches were full of lags.
4gamer: "Looking at it from the outside, we'd assume that throwing in the mode would have been easy since you guys have already done that in SSF4, but it's apparently not."
Ryota: "No. But I thought so in the beginning too (laughs)." [*rest of article snipped*]
Producer Ryota on MVC3's DLC characters:
4Gamer: "On another question, are there additional characters asides from Jill and Shuma-Gorath planned for a release?"
Ryota: "Not at the current time. They're actually not hard to add in, but there's some things that need to be tweaked, like the way how they'd be treated in online matches. There's not much to be said at the current time."
The article is a good read. It also covers some additional tidbits such as--
1.MVC3's project actually started around the same time as SF4 about 5-6 years back, and it wasn't developed as an offspring of TatsuvsCap.
2.TatsuvsCap was developed with the system mechanics as the core balance of the game, like, all the characters have double jumps and air dashes. On the other hand MvC3 prioritized character developments with everyone having their own strengths, and the developers balanced things out from there. Everyone universally had double jumps and whatnot in the earlier stages of the game's build, but the developers realized that wasn't what MvC was about and redid things.
3.The X-factor was added in as something that can keep players motivated when they're losing. The developers took their time debating over how to feature the system, like whether it should be usable over and over or just once. Eventually they decided that once is good, but that players can decide when to execute it.
4.Marvel actually had their own requests that they wanted to see from Capcom's side, but some of them weren't possible due to copyright issues. (Personal note: what characters do Capcom not own? SFEX and Strider? Anything else?)
5.One of the reasons why Venom isn't in the game is because his design has changed so much since before.
6.Viper's popularity as a SF4 character is in par with the three others, but her looks fit the game perfectly when the developers tried throwing her SF4 model in there.
7.Jill was more or less a request from Capcom Europe.
8.Shuma was a strong request from Capcom and Marvel wanted other characters, but got the approval if he/it was to be released as a DLC instead. (This reconfirms developer leaks on the Internet.)