Molotov Cocktails would be great and ideal content to add in a patch after release of HOS, since additional work is required to make it work...
Maybe we can expect it then (if at all), but probably not in the initial release...
I know that COD: World at War had a Molotov Cocktail, but it didn't work very well or as one would imagine it would in reality. The flames didn't spread as they would, and you would use them to throw against infantry, rather than against vehicles which they were primarily designed for.
It seems that it would take an ***-ton of additional work to implement realistic Molotovs. They would be cool, but you can easily use AT rifles or satchel charges to disable or kill a tank, which they (presumably) already have implemented into HOS.