I'd just hate to see you cite incorrect points you believe to be true, or speculate on things we know to not be the case, when such a well-written, short, and inexpensive article is available. I mean, wouldn't reading about what actually happened be better than just throwing shit at the wall?

Some things to help you out:

West and Zampella didn't try to sell anything to anyone. Activision got evidence of one lunch and used it as a springboard to fire the two. They found this info by hiring one of their IT guys to dig through IW emails and computers just to find any cause to fire them. There was testimony in court from the people ordered to do this, that Kotick and other Activision big wigs were simply "tired of the two" or something to that effect. A lot of your theory rests on this idea, but it's just a lie. The reality is Activision was desperate to keep the two on after MW1 blew up so they gave them a huge sweetheart deal they had no intention of honoring. A lot of people know West and Zampella had veto power on what timelines the Treyarch games could tackle, but they also had control of any other MW element infused into the other games, and marketing. These are things Activision were already starting to break in the contract. After MW2 Activision wanted IW to make another CoD game but West and Zampella would only do it if they could take IW staffers afterwards and make a different game that they wanted to make. Activision wanted no part of that and in the same meeting where these contract negotiations were going on, whipped out a document basically telling them to fuck off, you're fired for contract breach. Like I said, it's a shame so much of your theory hangs on the words of Activision lawyers. But help yourself out, read The Final Hours of Titanfall.

Other assertions I don't mind correcting you on. I don't recall Respawn ever promising a SP campaign for Titanfall to be released in the future, but I could be wrong. Link? Just yesterday they said it would be a step back to work on SP campaigns any more. Something that is odd reading your conspiracy theory, exactly what CoD game would have been in development that West and Zampella came to EA  with secrets from? Sledgehammer was making a 3rd person action game, but it was only a couple months into work, way too early to steal anything from. The shell of IW that was left after all the resignations, they made not one but two CoD games without West and Zampella. And of course Treyarch made Blops and Blops II. If they'd stolen TF gameplay ideas from an "in development CoD", we'd have been playing that CoD in like 2012 or 2013.

Of course, anyone who knows about the Titanfall development history knows this theory is laughable at best. Titanfall wasn't even the first game they went to concept with, and sure wasn't the first iteration of Titanfall they developed. It actually used to be more about the mechs, with long, grueling mech battles with powerful Titans and then you'd jump out when yours was doomed and have a "second life" as they described it as your regular human player. And the wall running element was inspired by Kick Ass, which was out after the two were fired. They also had serious ideas for a shooter where you swapped out body parts to gain abilities, but canceled it when they saw the latest Deus Ex. And another idea had you constantly on the run escaping the government as an alien.

One last note, you seem to be shitting on Zampella quite a bit, but the most egotistical force of the two was by far Jason West. And the biggest blow to Titanfall's development was his losing the passion for making games and quitting. Again, Final Hours of Titanfall. Goes into great detail about all of this. How many development changes were made, all the prototypes and ideas, all the struggles. The studio almost folded without ever putting a game out and would have, had it not been for Zampella.

Probably the most logically damaging argument that sinks S. S. Tinfoil Hatter, is the legal matter, as Machiavellian said. So you're implying they went around trying to sell these supposed CoD secrets that are only just now being shown in an actual CoD game, were sued for it, settled out of court, and then went ahead and released the game anyway, stolen CoD mechanics included? That's not how settlements work. Also, they were actually sued for damages implied by them not working on MW3. Basically what Activision thinks MW3 would have made, had West and Zampella worked on it. The monetary damage to CoD is only made worse by Activision allowing them to go ahead and utilize these stolen elements in their game anyway.

What happened is West and Zampella were granted the freedom they wanted, and went on to make the game the staff wanted to make. It wasn't the first game they came up with, it wasn't even the first version of the game they came up with.

One could just as easily argue, and with just as many facts, that Sledgehammer saw Titanfall and added double jumps and the boosting. Does it even have wall running? You list it as if the games share this element but I don't remember it from the AW trailer.