Usually it is popular characters that they offer as additional DLC, because they want to make money with them.
I guess the game will have about 20-25 characters in its initial roster and they will had 5-10 characters as DLC. Of course they will have many of the popular ones in the initial roster, but I bet they leave out several popular ones that they will sell to us later down the line.
Here are the 30 most popular characters of the poll again:
1.
Talim - 862
2.
Taki - 720
3.
Mitsurugi - 594
4.
Ivy - 536
5.
Kilik - 536
6.
Siegfried - 500
7.
Nightmare - 498
8.
Zasalamel - 471
9.
Yoshimitsu - 454
10.
Tira - 438
11.
Sophitia - 378
12.
Cassandra - 339
13.
Amy - 311
14.
Yun-seong - 295
15.
Seong Mi-na - 291
16.
Cervantes - 268
17.
Voldo - 259
18.
Xianghua - 257
19.
Raphael - 254
20.
Setsuka - 214
21.
Viola - 201
22.
Maxi - 199
23.
Hwang - 193
24.
Hilde - 154
25.
Astaroth - 142
26.
Z.W.E.I. - 113
27.
Natsu - 100
28.
Pyrrha - 98
29.
Xiba - 81
30.
Lizardman - 76
I can see them selling characters like Cervantes, Cassandra, Setsuka, Viola, Hwang etc. as DLC.