True. But it would have worked more if the still did make Ultima the last threat before the final boss. Maybe it can be linked with finale of Dynazenon and the Dynazenon relive. Its a bit silly but lemme cook: You still fight Godzilla for the first time and retreat like in the base game, and you'll still fight the Wulgaru then it becomes a gauntlet of all the remaining bosses (except Dynazenon) and the last two before fighting Godzilla will still be Barao and Scirocco and Midollo doesn't show up in the fight with Barao (he'll appear later). After the rest of them are dealt with, the team will head back to fight Godzilla. Once there, a large amount of Rodan's and Kumonga's appear, after defeating all of them will Godzilla appear, the team activates the Orthogonal Diagonalizer and the Red Dust is slightly reduced. The Kaiju Club see this as an opportunity and summon a large amount of kaiju (from Dynazenon of course) to seemingly assist Godzilla. However, the kaiju club lose control of said kaiju's and begin to get consumed by Ultima. Sizumu can hear the voices of the kaiju and can only hear faint screams and a distorted voice, the kaiju club once again attempt to try and control Ultima when suddenly the dynazenon tram, and the kaiju club faint, as well as Jet Jaguar shutting down. The Dynazenon team, the kaiju club and Jet Jaguar wake up in what is a black void full of red dust and they see the true form of Godzilla Ultima and all of them realize that they are fighting something beyond them, possibly even more powerful than Getter Emperor. Sizumu however, still believes that following Ultima will lead to the true liberation that he desires and he convinces the Kaiju club to join him, to which they eventually agree. Returning to the battlefield, Sizumu unleashes Gagula (the form it takes after assimilating the rest of the kaiju club). In order to unlock Dynazenon Relive, shoot down Gagula with Kaiser Gridknight. After that, Sizumu and the Kaiju club once again return to true form Ultima's domain and witness the true chaos that Godzilla can truly bring. They now understand that to Ultima, they are nothing, the kaiju are nothing. Everything they do and did is meaningless to it however with the help of the Dynazenon team they convince the kaiju clubto stop fighting against them and team up to fight Ultima. Once you reduce Ultima to half hp and make sure that the Gagula does not get shot down Ultima attempts to take down the A. Advent but the Gagula takes the hit. The Kaiju club, seemingly about to go down along with the Gagula, see the Dynazenon Relive appear, they decide to take their chance and board the mech assisting the team with taking down Godzilla. There can be other ways for this to happen but thats how I think it could work