Bentley
Jeep
Kia
Koenigsegg
Lotus
Radical
Zenvo
Bentley (Bentley is highly under-represented in Gran Turismo, only featuring the Speed 8, and no other cars. The Speed 8 could return, alongside the Continental and its racing versions, such as the GT3 race cars from 2014 and 2018. Assuming Polyphony still does fictional race cars, they could also build a fictional Continental Gr. 4).
Jeep (The Jeep that we have and seen so far is a Willys (not a Ford GPW), separate from the actual Jeep brand, and are actually two different entities in the GT Sport data-mine. Suppose we could see vehicles like the Wrangler Rubicon or the Grand Cherokee Trackhawk? - in fact, the Grand Cherokee Trackhawk is actually one of my personal favorite SUV's. Maybe with Jeep possibly arriving in GT7, we could see a larger number of SUV's and off-roaders, besides pick-up trucks?)
Kia (Hyundai has had a mixed following in Gran Turismo recently, especially in GT Sport with their N 2025 VGT (that car is a pain to drive, really, but it is wicked fast and rewarding if you can handle it, as it is friendly to the environment, but not to its driver) and race car versions of the Genesis Coupe (unfortunately, they're painfully uncompetitive, especially in Sport mode). And while we have race car concepts (and VGT design studies) from Genesis - their sister luxury brand renowned for their Art Deco-like styling, there seems to be one South Korean brand missing in the FX350 Gran Turismo Racing League, and that is Kia. Their sportiest machine, the Stinger GT, looks to fit right in GT7, and to give its sibling brands some competition (ironically, Kia is partly owned by Hyundai), maybe Polyphony can design Gr. 3 and 4 versions of the Stinger.)
Koenigsegg (With every succeeding Gran Turismo title, there's always that one manufacturer, or several others that everyone wants. We got Ferrari during the early days of the PS3 era, then on GT PSP we had Bugatti and Lamborghini, and shortly in GT5, other brands such as Maserati (albeit under-represented with only just the GranTurismo S), and McLaren followed soon thereafter. Fast forward to two games later, GT Sport became the first game in the series to officially feature Porsche - and surprisingly, Polyphony's partnership with Porsche is really strong indeed, heck, even Kaz's autobiographical car is a Porsche.
Nowadays, Koenigsegg is said to be the most-requested new brand to feature in the Gran Turismo series. Strong candidates of Koenigsegg vehicles to feature in GT7 are the Agera R, Agera RS (CN.143, the world record car), Jesko, One:1 and Regera. The CCGT could also be featured as a Gr. 3 car, so if Polyphony wants to add Koenigsegg to the FIA GTC Manufacturers' Series, they can build a fictional Agera Gr. 4 for the purpose.)
Lotus (Apparently due to a licensing fiasco which forced Lotus to pull out of GT Sport at the last minute, that might have been the reason why they never made it into GT Sport at all, not even in in-game updates. Perhaps this could be because they were acquired by Geely during the last few months of GT Sport's development, which meant that they would have to go through new licensing hurdles. In this case of another existing manufacturer in the game, Bugatti is now owned by Rimac, but is still partly owned by Porsche, hence the latter being the reason why they're still in GT7. Regardless, cars like the standard 2009 Evora, 2011 Elise, 2003 Elise 111S, 1997 Elise GT1, and the Exige S could feature, and perhaps maybe even the Evija, which has just as much horsepower as a lightning strike. If Polyphony wanted to include Lotus in the Manufacturers' Series, they could add the Evora GTE race car that raced in IMSA quite a while back, and an Evora GT4.)
Radical (Radical was seen in the datamine of GT Sport's files, and the most plausible vehicle from them could be the street-legal RXC Turbo. They could also even add the SR8 RX - one of their most popular track day machines, notable for setting a lap record in the Nurburgring at 6:48, before it was beaten by the Porsche 911 GT2 RS (991) '18. Surprisingly, if Radical were to feature in GT7, BAC wouldn't be the only British track-day manufacturer, although their cars are worlds apart from Radical.)
Zenvo (According to a video from a Youtuber who is, in fact, a banned GT Planet member, there was a screenshot of a DM which shows that Zenvo has shown interest in featuring in Gran Turismo. Perhaps GT7 could be their chance, and if that happens, it would be guaranteed that the TSR-S, their most well-known hypercar with the bizarre, seesaw-like wing, will feature in the game.)
