In my experience, most schools have similar essays from year to year. Every now and then, they will change/modify a question. Also, you can expect most schools to have the classic MBA essays question (Why MBA?) in some shape or form.
But more importantly, why do you want to start working on your essays now? So much of your candidacy can/will change in one year! You may have new interests, experiences, insights that could impact your essays next year. Why not wait until next year.
Instead, focus on variables you can control. Have you take the GMAT? Are you happy with your score? Do you have quality ECs? How is your college GPA? If lower than average, have you considered taking a stats/calculus/accounting course at a local college to help offset any concerns?
Just my 2 cents.
Good luck!
NP
Nikhil P. | Admissions Consultant | Veritas Prep