noun (n)

• the quality of being encouraging or promising of a successful outcome(noun.attribute)

  Synonym:
  advantageousness, favorableness, favourableness, positiveness, positivity
  Antonym:
  unfavorableness, unfavourableness
  

  source: wordnet30
• the quality of affording gain or benefit or profit(noun.attribute)

  Synonym:
  gainfulness, lucrativeness, profitability
  Antonym:
  unprofitability, unprofitableness
  

  source: wordnet30