Good question, here we are expecting 18.2 on Dec 9th so will it be just as long wait for beta 2? As Kal Madda mentioned new features, something has to keep us entertained for that long a time.Just the yearly reminder for everyone that beta 1 in past years has gone from Dec till after the first of the year. It can be a long beta 1 cycle if tradition holds true.
Dec 11th 17.2 released
Dec 12th 17.3 beta
Jan 4th 17.3 beta 2
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Dec 13th 16.2 released
Dec 14th 16.3 beta
Jan 10th 16.3 beta 2
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Dec 13th 15.2 released
Dec 20th 15.3 beta
Jan 13th 15.3 beta 2