It is not certain that study of Abhidhamma is absolutely needed for the development of right view. But I think to come to right view is so important that any help we can get should be welcomed. Abhidhamma has one flavour, that of anatta, so when studied in the right way it supports rightview, helps it to blossom.
Sometimes people give the example of monks who were able to become arahants simply by listening to a sentence from a sutta. These type of arahants are called Ugghatitannu : an individual who encounters a Buddha in person, and who is capable of attaining the Holy Paths and the Holy Fruits through the mere hearing of a short concise discourse.
See this suttahttp://www.metta.lk/...aka/4Anguttara-
As I suggested on this other threadhttp://www.abhidhamm...hp?showtopic=29
we, at this time, are not like those great ones. It is difficult for beings of this age to understand Dhamma and so we should really welcome any help.
Moreover I believe if anyone was genuinely developing rightview they would recognize that the Abhidhamma was profound and worthy. Some might not be inclined to study it much, but at least they would see that Suttanta and Abhiddhamma are in agreement (as Sukinder said).
Also in the Commentary to the Atthasalini it says that those who study Suttanta wrongly may come to wrongview. This is because the suttas use conventional language (he, she, I, person etc). So the Abhidhamma is a protection against reading Suttas through the lens of selfview.