I think those players all have the potential to achieve legend status at Arsenal (maybe not Monreal so much, and maybe not Giroud though for the latter I'd argue because he's under-rated by many) if they a.) Keep going the way they're hoped to for a few years (improving for youngsters like Bellerin, staying the same quality for Cazorla) and b.) are instrumental in bringing a few more trophies to the club. It needs a mix of personal quality, longevity at the club and also team success.

That said, even if none of them go down in the books as legends, they can still be excellent examples of great value purchases.