imponderables, ifs, uncertainty, variables, surprises, pitfalls, crapshoot, maybes, scenarios, downsides, obstacles, challenges, givens, certainty, trepidation, unpredictability, unknown quantity, improbabilities, pluses, permutations, questions, pros, possibilities, guesses, newcomers, wiggle room, quandaries, disappointments, positives, illusions, complexities, dilemmas, doubts, rough sledding, rookies, superstars, growing pains, conundrums, caveats, jitters, contingencies, risks, provisos, constraints, considerations, upsides, guesswork, drawbacks, misgivings, ramifications, limbo, stars, quibbles, wannabes, possibles, ambiguities, skeptics, contenders, unsettlement, showstoppers, doubters, enigmas, things, negatives, dicey, murkiness, bugaboos, vagaries, anxiousness, perils, hoopla, hesitations, worries, conjecture, twists, crosscurrents, prognosticators, biggies, nervousness, theories, hopefuls, actors, trickiness, assumptions, overachievers, hype, factors, mysteries, terra incognita, simultaneous equations, bumps, untalked, minefield, disadvantages, unfamiliarity, flux, absolutes, equation, bummers, distractions, incertitude, confusion, uncertainties, benefits, bottlenecks, dimensions, impediments, problems, unknown, causes, prob, vulnerabilities, advantages, con, intrinsic