Not much is known about mabi2... but if its Mabi with awesome graphics, sure, why not?
I mean, pleione engine has its puny limits. But imagine Mabinogi in graphics like... with bump mapping, normal mapping, HDR, shader 4.0... Just Mabinogi in Unreal Engine 3
As for mabinogi heroes.. well I might give it a shot when korean closed beta ends. btw steparu from mari server takes part in the closed beta o.o