The Arab world is very very diverse, in terms of political regimes, economic structures, demographics, racial profile (it's better not to speak about race, so let's avoid this topic), and geography, to say the least. There is no Arab unity and there has been no Arab unity for the last century or so. In the Arab world, there are feeble attempts to unite the North African countries like Algeria, Libya, Tunisia and Morocco, also Mauritania in the Maghreb Union. There is also the GCC in the east including the six wealthy Arab countries with same culture and background, which may expand to include Yemen and/or Iraq in the future. There was also a United Arab Republic involving Egypt Syria and Yemen (if I am not wrong) during Gamal/Jamal Abd El Nasser's time, and that project also splintered.
All in all, Iran only became important in the Arab public opinion only after the American illegal terroristic invasion of Iraq in 2003 and in its aftermath. Likewise, Turkey only gained some attention due to Erdogan and Davutoglu's rhetorics and promotions in some Arab countries but beyond that, most Arabs actually don't care much about Turkey or Iran and know very well how much these two countries could actually offer even if they tried their best.
It's actually better for the Arabs to work together to strengthen their own union by focussing on international and domestic political issues, economy, science, technology, addressing social issues, and carrying out research to further develop industry and knowledge and understanding of the Universe itself, which can be done well if the educational structure is radically overhauled, which can only be done once 'Western allies' (most Arab leaders) or 'secular dictators' (Bashar Al Assad, Gaddafi) are overthrown/removed from power.