So, when we finish FireRed, the Time will be fixed and Platinum will follow the original timeline, more akin with the Main Pokémon Game? Since people agreed that FireRed universe is a Alternative Timeline born because Bill tried to go to the past and change it, should after it the timeline be fixed, so we move to Platinum?

I guess this would make more sense, because:

Like, for example, we choose Leaf, but Red is the only one who appears in Gen 4 and 5. People in Gen 5 speaks about the events in Hoenn as it was happened in Emerald.

So, the timeline will return to the Main Timeline?