Here are all A321s with sharklets beyond MSN 5854 (last one listed on planespotters):
> MSN 5860: American Airlines
> MSN 5865: JetBlue
> MSN 5884: American Airlines
> MSN 5904: American Airlines
> MSN 5922: Finnair
> MSN 5932: American Airlines
> MSN 5938: American Airlines
> MSN 5946: American Airlines
> MSN 5955: American Airlines
> MSN 5960: JetBlue
> MSN 5961: Finnair
> MSN 5975: American Airlines
> MSN 5983: American Airlines
> MSN 5991: American Airlines
> MSN 5998: China Eastern
> MSN 6009: TransAsia
> MSN 6020: American Airlines
> MSN 6024: Eva Air
> MSN 6042: Eva Air
> MSN 6046: American Airlines
> MSN 6063: American Airlines
> MSN 6070: American Airlines
> MSN 6083: Finnair
> MSN 6087: Eva Air
> MSN 6094: American Airlines
> MSN 6108: Etihad
> MSN 6143: Etihad
> MSN 6162: American Airlines
> MSN 6205: Air Berlin
> MSN 6227: American Airlines
> MSN 6245: American Airlines
> MSN 6252: American Airlines
> MSN 6268: American Airlines
A few notes:
> There are many more A321s
without sharklets listed but that's too much work to copy/paste.
> The ATDB also lists Vietnam Airlines as having sharklets but as far as I know, they will not have sharklets.
> Etihad A321s are listed without sharklets, but the above picture of
spotterxfw shows it with sharklets.
> Based on the info above, I assume many more A321s will get sharklets than currently being listed.
> I can't see the engine selection with my basic account thus we should assume they'll use the same engine as today's A321s.