Well i for one love fire type pokemon and i always start the game with them first. that being said it is actually logical for GF to release few fire type other than starters and legends since fire is not something that is abundant in life all that much. So in sinnoh it made sense they had only chimchar and ponyta line,that place is cold, but it was idiotic for flint to have fire-theme.Furthermore they made it colder in platinum and added magmar,houndoom lines. So if gen 5 is not based somewhere like hoenn, in which we get 7 (vulpix and slugma lines from gen1 and 2 respectively) obtainable pokemon besides starter, which is hotter we will not see many new fire pokemon.
Unlike Ghosts, Dragons, Electricity-based lifeforms, and Psychics?