After playing Super Robot War for a while, I started to notice that the in-game conversation between mission to mission can sometime be hinting what will be expected in the next release. In example, as I was playing Alpha 3 a while ago, the theme of this game is called At The Galaxy End, which is the same phrase that appeared in the in-game conversation in Super Robot War MX.
I've played Super Robot War MX first before playing Alpha 3, but have never really read the conversation properly. Until I replayed the MX again, I found out that the in-game conversation did mentioned about At The Galaxy End, a conversation between Zero (villain from Dendoh) and the boss of Chronos (from Machine Robo: Revenge of Chronos), where the boss of Chronos telling Zero that the each universe would come to meet its end, hence using the phrase At The Galaxy End, which is the reason why the Chronos has been harvesting the necessary power to do the dimension jumping from one dimension to another dimension in order to survice through that catastrophe end. Then come Super Robot War Alpha 3: At The End of Galaxy, which basically is based on the theme where the heroes have to face that catastrophe end ignited by the endless power of Ide (from Ideon).
Then Super Robot War Alpha 3 did have a special stage where we get to see all the original characters playing together, which gives some hint that the next game is going to be released would be based on the original character, hence Super Robot War OGs (a remake of OG and OG2 of gameboy), which later they did came out with the game.
Then in OGs, there are mentioning of Dai-Rai-Oh (the main super robot character in Alpha 3), which Ryusei Date said of as a super robot focuses more on kicking style attack, which has already appeared in Alpha 3, then in OGs Gaiden, Touma the pilot of Dai-Rai-Oh appeared, which certainly hinting it will be appearing in the future installment, which it would in the upcoming OGs 2.
Not only that, but OGs did link to other Super Robot War game as well, such as Mugen No Frontier & Mugen No Frontier Exceed, where the W series that being mentioned in the early part of OGs 2 appeared, and also the plan EF (Endless Frontier) drafted by Lemon Browning mentioned by Axel Almer in the end of OGs Gaiden also is referring to the Mugen No Fronter series, which Axel Almer appeared in the 2nd installment.
And finally, there's a mentioning of Exbein, which simply referred to as EX in the in-game conversion in OGs Gaiden. At first I don't really understand what it means, but after the released of Exbein, and as I was playing the game again, I realized that the EX mentioned is indeed referring to Exbein. It is also the same in Super Robot War Z, where there are references made to character i.e. Ryouma of Getter Robo that his counterpart in another dimension/parallel world is much more violent than he is, which that version of Ryouma appeared in Super Robot War Z 2.
Although it is easy to say that these are the things that we should have expected from game maker, but like Banpresto that's making such a hint by nicely blending it into the in-game conversation? That I would say is a clever move. Unfortunately since it is only available in Japanese, therefore only the Japanese would know what is going on. Nevertheless, this is also one of the reason why I'd never get bored with Super Robot War because you could expect quite a lot of things by piecing the puzzle here and there, much like reading the Bible.