"Benim geliştirilecek yeni fikirlerim var."
Çeviri:I have new ideas to develop.
I think they are not totally synonyms. You could improve something which is already existing, but if you develop something it is not yet completed. I am not English, not Turkish. Therefore I can't explain better, what I am thinking. Perhaps for that reason they are here using "geliştirilmek". Before they always used "geliştirmek". I am not sure so far.