Future continuous describes ongoing actions that will happen in the future. The ‘yes/no’ question form follows this structure:
Will + subject + be + verb-ing?
A question word can be added:
What will you be doing in Boston?
Note that “will” indicates the future, the auxiliary verb “be,” and finally the main verb in its continuous form (verb-ing).
The subject is not always between ‘will’ and ‘be’:
What will be happening in the next five minutes?
In the English Grammar Profile, B2 point 55 in the category of FUTURE / continuous is defined as:
‘yes/no’ and ‘wh-‘ question forms with ‘will’
An iWeb search for will _p* be _v?g*
gives the following Ngrams that may point to questions.
1 WILL YOU BE DOING 1380
2 WILL YOU BE USING 1006
3 WILL I BE DOING 497
4 WILL YOU BE GETTING 444
5 WILL YOU BE WORKING 422
6 WILL YOU BE MAKING 421
7 WILL YOU BE TAKING 318
8 WILL YOU BE WATCHING 316
9 WILL WE BE SEEING 303
10 WILL YOU BE ADDING 279
11 WILL YOU BE TRYING 271
12 WILL YOU BE PICKING 258
13 WILL YOU BE GOING 232
14 WILL YOU BE BUYING 194
15 WILL YOU BE PLAYING 181
16 WILL YOU BE ATTENDING 160
17 WILL YOU BE WEARING 139
18 WILL I BE WORKING 132
19 WILL YOU BE HELPING 124
20 WILL YOU BE LOOKING 122
21 WILL YOU BE CELEBRATING 105
23 WILL YOU BE GIVING 101
24 WILL YOU BE TUNING 100
25 WILL WE BE DOING 98
26 WILL YOU BE OFFERING 95
27 WILL THEY BE DOING 90
28 WILL YOU BE SPENDING 88