Inclusion Criteria:

          -  Newly diagnosed disease with either a diagnosis of "high-risk" MDS (>= 10% blasts in
             marrow or blood), high-risk myeloproliferative neoplasm (MPN; >= 10% blasts in blood
             or bone marrow), or AML other than acute promyelocytic leukemia (APL) with
             t(15;17)(q22;q12) or variants according to the 2008 World Health Organization (WHO)
             classification; patients with biphenotypic AML are eligible; such "high-risk" MDS or
             MPN have natural history much closer to AML than to lower risk MDS or MPN and have
             responded similarly to "AML-type" therapy

          -  Outside diagnostic material is acceptable as long as peripheral blood and/or bone
             marrow slides are reviewed at the study institution by appropriate clinical staff;
             flow cytometric analysis of peripheral blood and/or bone marrow should be performed
             according to institutional practice guidelines

          -  Treatment-related mortality (TRM) score =< 13.1 as calculated with simplified model

          -  The use of hydroxyurea prior to study registration is allowed; patients with
             symptoms/signs of hyperleukocytosis or white blood cell (WBC) > 100,000/uL, or acute
             symptoms can be treated with leukapheresis or may receive up to 2 doses of cytarabine
             (up to 500 mg/m^2/dose) prior to study day 0 enrollment

          -  Bilirubin =< 2 times institutional upper limit of normal unless elevation is thought
             to be due to hepatic infiltration by AML, Gilbert's syndrome, or hemolysis (assessed
             within 10 days prior to study day 0)

          -  Serum creatinine =< 2.0 mg/dL (assessed within 10 days prior to study day 0)

          -  Left ventricular ejection fraction >= 45%, assessed within 3 months prior to study day
             0, e.g. by multi gated acquisition scan (MUGA) scan or echocardiography, or other
             appropriate diagnostic modality and no clinical evidence of congestive heart failure

          -  Women of childbearing potential and men must agree to use adequate contraception
             beginning at the signing of the consent until at least 3 months after the last dose of
             study drug

          -  Provide written informed consent (or legal representative)

        Exclusion Criteria:

          -  Myeloid blast crisis of chronic myeloid leukemia (CML), unless patient is not
             considered candidate for CML-directed tyrosine kinase inhibitor treatment (excluding
             sorafenib)

          -  Concomitant illness associated with a likely survival of < 1 year

          -  Active systemic fungal, bacterial, viral, or other infection, unless disease is under
             treatment with anti-microbials and/or controlled or stable (e.g. if specific,
             effective therapy is not available/feasible or desired [e.g. chronic viral hepatitis,
             human immunodeficiency virus (HIV)]); patient needs to be clinically stable as defined
             as being afebrile and hemodynamically stable for 24-48 hours prior to study day 0,
             unless fever is thought to be secondary to the underlying hematologic disease

          -  Active or clinically significant (or symptomatic) cardiac disease, including active
             coronary artery disease, cardiac arrhythmias requiring anti-arrhythmic therapy other
             than beta blockers or digoxin within the last 3 months, unstable angina (anginal
             symptoms at rest), new-onset angina within 3 months before randomization, or
             myocardial infarction within 6 months before study day 0

          -  Previous receipt of azacitidine, decitabine, anthracyclines, cytarabine, or other
             nucleoside analogues for treatment of AML or MPN/MDS other than as noted for
             cytarabine

          -  Pregnancy or lactation

          -  Concurrent treatment with any other investigational agent that has anti-leukemia
             activity or another drug with anti-AML-activity