Hi,

If you aspiring to be a marketing manager then you must start working on your communication, relation ship building and negotiation skills. These are the 3 must have skill for a marketing manager.

A person who is good at selling or having convincing power is best fit for tbe job. 

You need not to be a MBA for landed up in a marketing manager job but now a days corporates prefers a MBA over a general graduate. If you have a degree from a top tier school you have more chances of skiping the hierarchy to be a marketing manager as soon as you step out of the college. 

Let me know stream you currently  perusing, so that I can guide you accordingly.