The Collaborative International Dictionary of English v.0.48:

Anticipatory \An*tic"i*pa*to*ry\
   ([a^]n`t[i^]s"[i^]*p[.a]*t[-o]*r[y^]), a.
   Forecasting; of the nature of anticipation. --Owen.
   [1913 Webster]

         Here is an anticipatory glance of what was to be. --J.
                                                  C. Shairp.
   [1913 Webster]

WordNet (r) 3.0 (2006):

anticipatory
    adj 1: in anticipation [syn: anticipatory, prevenient]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "anticipatory":
   agape, agog, all agog, antecedent, anterior, anticipant,
   anticipating, anticipative, atiptoe, awaiting, beforetime,
   bright and early, certain, ci-devant, clairvoyant, confident,
   divinatory, eager, earlier, early, elder, expectant, expecting,
   farseeing, farsighted, first, fore, forearmed, foregoing, forehand,
   forehanded, foreknowing, foreseeing, foresighted, forestalling,
   forethoughted, forethoughtful, forewarned, former, gaping, hopeful,
   in anticipation, in expectation, in good time, intuitive,
   longsighted, looking for, looking forward to, not surprised, older,
   optimistic, preceding, precognitive, precognizant, precurrent,
   preexistent, prepared, prescient, prevenient, previous, prime,
   prior, provident, providential, prudent, ready, sagacious,
   sanguine, senior, sure, unsurprised, waiting, waiting for,
   watching for