They'll flop it on their own then.
First like you said it's toyota vs Hyundai.
Second one is a well established car, the Altis with a great support network and great resale.
For any new car to even come close to an established one, it first has to beat its price with a good margin AND provide better features at the same time.
If it has cruise control, vehicle stability and is priced at least 3-4 lakhs lower, it will definitely sell.
Otherwise good luck.