Some interesting pondering about potential cars for the future of DTM by @BCBrownell. I mostly agree with the stream of thought especially in the fact that it doesn't make sense to make it into another GT3 series but I have an alternate take. https://jalopnik.com/dtm-has-a-few-options-1843114536

While I am a big fan of GT sedans like the Acura TLX GT, I don't think that the solution is to create a GT3 type class of sedans because while it may not be as costly as current DTM builds, it would still require significant investment. There is another path along the same theme.

While there is a good example with GT3 costs being low for customers, I believe that starting with a tube frame chassis might be good on multiple levels and for multiple series and the basis for that could be the NASCAR Next Gen car.

My point of view here is that NASCAR has already done significant development on this chassis and could potentially share it with DTM as well as Australian Supercars. While it may seem odd on the surface, there is some parity already.

Current wheelbase for each series is probably the most glaring similarity:

NASCAR: 110 inches
DTM: 110 inches
Supercars: 111 inches

The NASCAR Next Gen car is already being built to take on huge crashes so sharing it with other series won't require chassis upgrades. The benefits are large as it would allow the expansion of manufacturers in all 3 series.

The reason I chose wheelbase as a comparison is for the fact that the chassis could be shared easily across all 3 series so a NASCAR Cup car could be reconfigured for a DTM race or a Supercars race and the opposite thus reducing costs and allowing crossover.

This would meet one of the big goals of adding more OEMs for all 3 series as cars brands currently in NASCAR could could run in DTM or Supercars and DTM makes could run in NASCAR. Imagine an Audi A4 running in a Cup race or a Mustang Cup car in a DTM race.

Supercars would automatically get updated bodies because they already run the Mustang and could replace the Holden with a Camaro and they have been trying to get Toyota in the series so the Camry might be an option there.

NASCAR Next Gen is already planning to use a variant of the Supercars Xtrac sequential so there is already parity there and both series are running V8s. DTM teams would have to adopt V8s to be compatible but that could come as NASCAR and Supercars update engines.

All 3 series are also looking to move to hybrid powertrains in the next few years which is another area where their goals stack up perfectly and it is likely that NASCAR and Supercars will end up somewhat similar solutions anyway but now the cost is spread even more.

Converging the car would allow each series the opportunity to have at least 5 makes represented from the current batch and it would make it more attractive for other OEMs to join because they could compete globally.

The parts are sourced from all over the world even now as NASCAR is already buying brakes from Italy while Supercars engine builders are buying pistons from a NASCAR supplier in Nevada and that is already going to expand even more worldwide anyway.

This would also save on simulator and engineering costs for manufacturers as they wouldn't have to work with multiple models so they could offer support to teams at a lower cost which would hopefully allow for more entries.